# US 5,704,499 A · Slack adjusting gravity wedge for railway slackless drawbar assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,704,499 A - Document ID: US5704499A - Status: Granted - Kind: A - Application number: 08/697,878 - Filed: 1996-08-30 - Granted: 1998-01-06 - Earliest claimed: 1996-08-30 - Assignees: McConway & Torley Corporation - Inventors: Jeffrey D. Wurzer; Peter Scott Mautino; Frank Lazzaro; Joseph L. Gagliardino - Web page: https://patentgrep.com/patent/US5704499A ## CPC - B61G 9/20: Details; Accessories - B61G: COUPLINGS; DRAUGHT AND BUFFING APPLIANCES (vehicle connections in general B60D) ## Abstract A non-binding, slack-adjusting, gravity wedge member for use in a railway slackless drawbar system, the wedge member having a pair of opposed friction faces at an inclined angle to each other, with a first of the faces having at least one recess therein adapted to receive an elastomeric body bonded therein such that an outer, flat surface of the elastomeric body is exposed and spaced outwardly from and parallel to the first face, such that the elastomeric body has an exposed outer flat surface of at least about 35 square inches, and a hardness of at least about 50 durometers. ## Claims ### Claim 1 A non-binding, slack-adjusting, gravity wedge member for use in a railway slackless drawbar system, said wedge member having a pair of opposed friction faces at an inclined angle to each other, a first of said faces having a recess therein receiving an elastomeric body bonded therein such that an outer, flat contact surface of said elastomeric body is exposed and spaced outwardly from and parallel to said first face. ### Claim 2 (depends on 1) A non-binding, slack-adjusting, gravity wedge member for use in a railway slackless drawbar system, according to claim 1, in which said friction faces are at an inclined angle of about ten degrees. ### Claim 3 (depends on 2) A non-binding, slack-adjusting, gravity wedge member for use in a railway slackless drawbar system, according to claim 2, in which said flat contact surface of said elastomeric body is spaced outwardly from said first face by a distance of at least 1/4 inch. ### Claim 4 (depends on 3) A non-binding, slack-adjusting, gravity wedge member for use in a railway slackless drawbar system, according to claim 3, in which said first face is provided with two of said recesses therein each recess receiving a said elastomeric body. ### Claim 5 (depends on 4) A non-binding, slack-adjusting, gravity wedge member for use in a railway slackless drawbar system, according to claim 4, in which said two recesses are rectangular in form and side-by-side and aligned in a vertical direction of said gravity wedge member, such that two said elastomeric bodies are exposed in a side-by-side relationship. ### Claim 6 (depends on 5) A non-binding, slack-adjusting, gravity wedge member for use in a railway slackless drawbar system, according to claim 5, in which said two recesses comprise two slots which extend the vertical length of said first face such that said elastomeric bodies are exposed throughout the vertical length of said first face to provide two contact surfaces lying in the same plane. ### Claim 7 (depends on 6) A non-binding, slack-adjusting, gravity wedge member for use in a railway slackless drawbar system, according to claim 6, in which said elastomeric bodies are bonded within said recesses by vulcanizing said elastomeric bodies in place. ### Claim 8 (depends on 7) A non-binding, slack-adjusting, gravity wedge member for use in a railway slackless drawbar system, according to claim 7, in which said elastomeric bodies provide at least about 35 square inches of exposed, contact surface area. ### Claim 9 (depends on 8) A non-binding, slack-adjusting, gravity wedge member for use in a railway slackless drawbar system, according to claim 8, in which said elastomeric bodies provide approximately 38 square inches of exposed, contact surface area. ### Claim 10 (depends on 8) A non-binding, slack-adjusting, gravity wedge member for use in a railway slackless drawbar system, according to claim 8, in which said elastomeric bodies are fabricated of neoprene. ### Claim 11 (depends on 8) A non-binding, slack-adjusting, gravity wedge member for use in a railway slackless drawbar system, according to claim 8, in which said elastomeric bodies have a hardness of at least about 50 durometers. ### Claim 12 (depends on 8) A non-binding, slack-adjusting, gravity wedge member for use in a railway slackless drawbar system, according to claim 8, in which said elastomeric bodies have a hardness of approximately 70 durometers. ### Claim 13 A non-binding, slack-adjusting, gravity wedge member for use in a railway slackless drawbar system, said wedge member having a pair of opposed friction faces at an inclined angle to each other, a first of said faces having at least one recess therein receiving an elastomeric body bonded therein such that an outer, flat surface of said elastomeric body is exposed and spaced outwardly from and parallel to said first face, said elastomeric body having an exposed outer flat surface of at least about 35 square inches, and a hardness of at least about 50 durometers. ### Claim 14 (depends on 13) A non-binding, slack-adjusting, gravity wedge member for use in a railway slackless drawbar system, according to claim 13, in which said first face has two said recesses therein, said recesses being of elongated rectangular form in a side-by-side relationship equally spaced on each side of a vertical axis on said first face. ### Claim 15 (depends on 14) A non-binding, slack-adjusting, gravity wedge member for use in a railway slackless drawbar system, according to claim 14, in which said first face is also provided with at least one wear indicator appropriately placed to become visible below associated hardware when the drawbar system components have worn to the point of needing replacement. ### Claim 16 (depends on 15) A non-binding, slack-adjusting, gravity wedge member for use in a railway slackless drawbar system, according to claim 15, in which said wear indicator is spaced approximately 10 inches down from an upper edge thereof. ### Claim 17 (depends on 16) A non-binding, slack-adjusting, gravity wedge member for use in a railway slackless drawbar system, according to claim 16, in which three said wear indicators are provided disposed in a parallel relationship, one on said first face between said elastomeric bodies, with one each on said first face adjacent to each outer edge of said elastomeric bodies. ### Claim 18 (depends on 13) A non-binding, slack-adjusting, gravity wedge member for use in a railway slackless drawbar system, according to claim 13, in which a pair of opposed tool grooves are provided in opposed side surface of said gravity wedge. ### Claim 19 (depends on 18) A non-binding, slack-adjusting, gravity wedge member for use in a railway slackless drawbar system, according to claim 18, in which a tool groove is provided in the upper edge surface of said gravity wedge centrally disposed between said elastomeric bodies. ### Claim 20 (depends on 13) A non-binding, slack-adjusting, gravity wedge member for use in a railway slackless drawbar system, according to claim 13, in which a second of said faces is provided with a non-inclined lower portion parallel to said first face upon which product information in imprinted.